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  1. For Sale or Trade Pro Circuit T4 Slip On

    For Sale / Wanted
    I have a Pro Circuit T4 slip-on on my KFX, wanting to switch it up a bit. I am interested in trading plus cash depending on exhaust you have, kind of wanting to go to a full system. Shoot me some offers, let me know what you got!
  2. Help needed! Trying to find map that works for PCV

    Dyno/Tuning Room
    I have an 09 KFX450R with a slip on Pro Circuit T4. I have stock airbox/intake no lid. Just installed a Power Commander 5 and can't find a map that will work. Found a map with different slip on, runs decent with some hiccups, but does not run 100%. With the newer software, it looks like a PCIII...
  3. HELP please?

    Engine/EFI/Drivetrain
    So I just came back from riding at hungry valley at gorman Ca and rolled my kfx down a big hill and now it won't start. Fuel pump still cycles, turns over but just doesn't start. Could it be something electrical? Any help/ideas would be great thanks
  4. Pro Circuit exhaust header question

    Engine/EFI/Drivetrain
    I got a 2011 kfx and I came across a pro circuit t4 that is for a 08 it fits and all but were the header goes into the engine I looks like it should go in more. when I run it I don't hear no leaks but just want to know if its ok
  5. Fuel Controller needed with just an exhaust

    Dyno/Tuning Room
    Need help guys just got a 2011 kfx 450 and I was wondering if I needed a fuel controller if I was going to just run a full system pro circuit t4 exhaust with stock air filter and cloded box I am planning to put a intake and fuel controller later when I get more money just got the exhaust for now...
  6. FS. Brand New Un-used Pro Circuit Cams

    For Sale / Wanted
    as description states im a looking to sell a set of brand new never used or installed pro circuit cams.. still in box.. I paid retail of 844.95 directly from pro circuit.. will sell for 700.. price maybe negotiable
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